Android之解析XML文件三种方式（DOM，PULL，SAX）

1.xml文件代码

<?xml version="1.0" encoding="UTF-8" ?><%@ page language="java" contentType="text/xml; charset=UTF-8" pageEncoding="UTF-8"%><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%><%@ page isELIgnored="false" %><fqs><c:forEach items="${fqs}" var="fq">            <fq name="${fq.name}">                <content>${fq.content}</content>                <time>${fq.time}</time>            </fq>    </c:forEach>    </fqs>

2.XML网页效果图

3.Android代码

1.布局文件<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:onClick="getXML"        android:text="获取XML数据" />    <ListView        android:id="@+id/lv_main_list"        android:layout_width="match_parent"        android:layout_height="wrap_content">    </ListView></LinearLayout><?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main_pull"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:onClick="getPULL"        android:text="获取PULL数据" />    <ListView        android:id="@+id/lv_mainpull_list"        android:layout_width="match_parent"        android:layout_height="wrap_content">    </ListView></LinearLayout><?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main_sax"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:onClick="getSAX"        android:text="获取SAX数据" />    <ListView        android:id="@+id/lv_mainsax_list"        android:layout_width="match_parent"        android:layout_height="wrap_content">    </ListView></LinearLayout><?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="horizontal">    <TextView        android:layout_width="0dp"        android:layout_height="wrap_content"        android:id="@+id/tv_item_listview_name"        android:layout_weight="1"/>    <TextView        android:layout_width="0dp"        android:layout_height="wrap_content"        android:id="@+id/tv_item_listview_content"        android:layout_weight="1"/>    <TextView        android:layout_width="0dp"        android:layout_height="wrap_content"        android:id="@+id/tv_item_listview_time"        android:layout_weight="1"/></LinearLayout>

2.java代码

DOM解析代码public class MainActivity extends AppCompatActivity {    private ListView lv_main_list;    private ProgressDialog progressDialog;    private List<FQ> fqs = new ArrayList<>();    private MyAdapter myadapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        lv_main_list = (ListView) findViewById(R.id.lv_main_list);        myadapter = new MyAdapter();        lv_main_list.setAdapter(myadapter);        progressDialog = new ProgressDialog(this);        progressDialog.setMessage("小青正在拼命加載中.....");    }    class MyAdapter extends BaseAdapter{        @Override        public int getCount() {            return fqs.size();        }        @Override        public Object getItem(int position) {            return fqs.get(position);        }        @Override        public long getItemId(int position) {            return position;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {            if(convertView==null){                convertView=LayoutInflater.from(MainActivity.this).inflate(R.layout.item_list,null);                ItemTag itemTag=new ItemTag();                itemTag.tv_name= (TextView) convertView.findViewById(R.id.tv_item_listview_name);                itemTag.tv_content= (TextView) convertView.findViewById(R.id.tv_item_listview_content);                itemTag.tv_tiem= (TextView) convertView.findViewById(R.id.tv_item_listview_time);                convertView.setTag(itemTag);            }            ItemTag itemTag= (ItemTag) convertView.getTag();            itemTag.tv_name.setText(fqs.get(position).getName());            itemTag.tv_content.setText(fqs.get(position).getContent());            itemTag.tv_tiem.setText(fqs.get(position).getTime());            return convertView;        }    }    public void getXML(View view) {        new MyTask().execute();    }    class MyTask extends AsyncTask {        //获取数据前        @Override        protected void onPreExecute() {            super.onPreExecute();            progressDialog.show();        }        @Override        protected Object doInBackground(Object[] params) {            //获取网络数据            //1.定义获取网络的数据的路径            String path = "http://192.168.43.149:8080/dataResult.xhtml";            //2.实例化URL            try {                URL url = new URL(path);                //3.获取链接对象                HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();                //4.设置请求                httpURLConnection.setRequestMethod("GET");                //5.设置请求链接超时的时间                httpURLConnection.setConnectTimeout(5000);                //6.获取响应码                int code = httpURLConnection.getResponseCode();                if (code == 200) {                    //7.获取返回过来的数据（XML）                    InputStream is = httpURLConnection.getInputStream();                    //8.使用DOM解析XML文件                    DocumentBuilderFactory documentBuilderFactory=DocumentBuilderFactory.newInstance();                    DocumentBuilder documentBuilder=documentBuilderFactory.newDocumentBuilder();                    Document document=documentBuilder.parse(is);                    //获取根标签                    Element root=document.getDocumentElement();                    NodeList nodeList = root.getElementsByTagName("fq");                    for (int i = 0; i < nodeList.getLength(); i++) {                        Element element = (Element) nodeList.item(i);                        //获取属性name                        String name = element.getAttribute("name");                        //获取子标签content,time                        Element elementContent = (Element) element.getElementsByTagName("content").item(0);                        String content = elementContent.getTextContent();                        Element elementTime = (Element) element.getElementsByTagName("time").item(0);                        String time = elementTime.getTextContent();                        FQ fq = new FQ(name, content, time);                        fqs.add(fq);                    }                }            } catch (Exception e) {                e.printStackTrace();            }            return fqs;        }        //获取数据后更新UI        @Override        protected void onPostExecute(Object o) {            super.onPostExecute(o);            progressDialog.cancel();            myadapter.notifyDataSetChanged();        }    }}PULL解析代码public class MainPullActivity extends AppCompatActivity {    private ListView lv_mainpull_list;    private ProgressDialog progressDialog;    private List<FQ> fqs = new ArrayList<>();    private MyAdapter myadapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main_pull);        myadapter = new MyAdapter();        lv_mainpull_list = (ListView) findViewById(R.id.lv_mainpull_list);        lv_mainpull_list.setAdapter(myadapter);        progressDialog = new ProgressDialog(this);        progressDialog.setMessage("小青正在拼命加載中.....");    }    class MyAdapter extends BaseAdapter {        @Override        public int getCount() {            return fqs.size();        }        @Override        public Object getItem(int position) {            return fqs.get(position);        }        @Override        public long getItemId(int position) {            return position;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {            if (convertView == null) {                convertView = LayoutInflater.from(MainPullActivity.this).inflate(R.layout.item_list, null);                ItemTag itemTag = new ItemTag();                itemTag.tv_name = (TextView) convertView.findViewById(R.id.tv_item_listview_name);                itemTag.tv_content = (TextView) convertView.findViewById(R.id.tv_item_listview_content);                itemTag.tv_tiem = (TextView) convertView.findViewById(R.id.tv_item_listview_time);                convertView.setTag(itemTag);            }            ItemTag itemTag = (ItemTag) convertView.getTag();            itemTag.tv_name.setText(fqs.get(position).getName());            itemTag.tv_content.setText(fqs.get(position).getContent());            itemTag.tv_tiem.setText(fqs.get(position).getTime());            return convertView;        }    }    public void getPULL(View view) {        new MyTask().execute();    }    class MyTask extends AsyncTask {        private FQ fq;        //获取数据前        @Override        protected void onPreExecute() {            super.onPreExecute();            progressDialog.show();        }        @Override        protected Object doInBackground(Object[] params) {            //获取网络数据            //1.定义获取网络的数据的路径            String path = "http://192.168.43.149:8080/dataResult.xhtml";            //2.实例化URL            try {                URL url = new URL(path);                //3.获取链接对象                HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();                //4.设置请求                httpURLConnection.setRequestMethod("GET");                //5.设置请求链接超时的时间                httpURLConnection.setConnectTimeout(5000);                //6.获取响应码                int code = httpURLConnection.getResponseCode();                if (code == 200) {                    //7.获取返回过来的数据（XML）                    InputStream is = httpURLConnection.getInputStream();                    //8.解析XML                    //使用PULL解析XML文件                    XmlPullParser pullParser= Xml.newPullParser();                    pullParser.setInput(is,"UTF-8");                    int type=pullParser.getEventType();                    while (type!=XmlPullParser.END_DOCUMENT){                        switch (type){                            case XmlPullParser.START_TAG:                                //获取开始标签名字                                String startTafName=pullParser.getName();                                 if("fq".equals(startTafName)){                                     fq = new FQ();                                     String name=pullParser.getAttributeValue(0);                                     fq.setName(name);                                 }else if ("content".equals(startTafName)){                                     String content=pullParser.nextText();                                     fq.setContent(content);                                 }else if ("time".equals(startTafName)){                                     String time=pullParser.nextText();                                     fq.setTime(time);                                 }                                break;                            case XmlPullParser.END_TAG:                                //获取接受标签的名字                                String endtagname=pullParser.getName();                                if("fq".equals(endtagname)){                                    fqs.add(fq);                                }                                break;                        }                        type=pullParser.next();                    }                }            } catch (Exception e) {                e.printStackTrace();            }            return fqs;        }        //获取数据后更新UI        @Override        protected void onPostExecute(Object o) {            super.onPostExecute(o);            progressDialog.cancel();            myadapter.notifyDataSetChanged();        }    }}SAX解析代码public class MainSaxActivity extends AppCompatActivity {    private ListView lv_mainsax_list;    private ProgressDialog progressDialog;    private List<FQ> fqs = new ArrayList<>();    private MyAdapter myadapter;    private String currentTag = null;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main_sax);        lv_mainsax_list = (ListView) findViewById(R.id.lv_mainsax_list);        myadapter = new MyAdapter();        lv_mainsax_list.setAdapter(myadapter);        progressDialog = new ProgressDialog(this);        progressDialog.setMessage("小青正在拼命加載中.....");    }    class MyAdapter extends BaseAdapter {        @Override        public int getCount() {            return fqs.size();        }        @Override        public Object getItem(int position) {            return fqs.get(position);        }        @Override        public long getItemId(int position) {            return position;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {            if (convertView == null) {                convertView = LayoutInflater.from(MainSaxActivity.this).inflate(R.layout.item_list, null);                ItemTag itemTag = new ItemTag();                itemTag.tv_name = (TextView) convertView.findViewById(R.id.tv_item_listview_name);                itemTag.tv_content = (TextView) convertView.findViewById(R.id.tv_item_listview_content);                itemTag.tv_tiem = (TextView) convertView.findViewById(R.id.tv_item_listview_time);                convertView.setTag(itemTag);            }            ItemTag itemTag = (ItemTag) convertView.getTag();            itemTag.tv_name.setText(fqs.get(position).getName());            itemTag.tv_content.setText(fqs.get(position).getContent());            itemTag.tv_tiem.setText(fqs.get(position).getTime());            return convertView;        }    }    public void getSAX(View view) {        new MyTask().execute();    }    class MyTask extends AsyncTask {        private FQ fq;        //获取数据前        @Override        protected void onPreExecute() {            super.onPreExecute();            progressDialog.show();        }        @Override        protected Object doInBackground(Object[] params) {            //获取网络数据            //1.定义获取网络的数据的路径            String path = "http://192.168.43.149:8080/dataResult.xhtml";            //2.实例化URL            try {                URL url = new URL(path);                //3.获取链接对象                HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();                //4.设置请求                httpURLConnection.setRequestMethod("GET");                //5.设置请求链接超时的时间                httpURLConnection.setConnectTimeout(5000);                //6.获取响应码                int code = httpURLConnection.getResponseCode();                if (code == 200) {                    //7.获取返回过来的数据（XML）                    InputStream is = httpURLConnection.getInputStream();                    //8.解析XML                    //使用SAX解析XML文件                    SAXParserFactory saxParserFactory = SAXParserFactory.newInstance();                    SAXParser saxParser = saxParserFactory.newSAXParser();                    saxParser.parse(is, new DefaultHandler() {                        @Override                        public void startDocument() throws SAXException {                            super.startDocument();                        }                        @Override                        public void endDocument() throws SAXException {                            super.endDocument();                        }                        @Override                        public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {                            super.startElement(uri, localName, qName, attributes);                            currentTag = localName;                            if ("fq".equals(localName)) {                                //实例化对象                                fq = new FQ();                                String name = attributes.getValue(0);                                fq.setName(name);                            }                        }                        @Override                        public void endElement(String uri, String localName, String qName) throws SAXException {                            super.endElement(uri, localName, qName);                            currentTag=null;                            if ("fq".equals(localName)){                                fqs.add(fq);                            }                        }                        @Override                        public void characters(char[] ch, int start, int length) throws SAXException {                            super.characters(ch, start, length);                            if ("content".equals(currentTag)) {                                String content = new String(ch, start, length);                                fq.setContent(content);                            }else if ("time".equals(currentTag)) {                                String time = new String(ch, start, length);                                fq.setTime(time);                            }                        }                    });                }            } catch (Exception e) {                e.printStackTrace();            }            return fqs;        }        //获取数据后更新UI        @Override        protected void onPostExecute(Object o) {            super.onPostExecute(o);            progressDialog.cancel();            myadapter.notifyDataSetChanged();        }    }}

//实体类

public class FQ {    private String name;    private String content;    private String time;    public FQ(){}    public FQ(String name, String time, String content) {        this.name = name;        this.time = time;        this.content = content;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public String getContent() {        return content;    }    public void setContent(String content) {        this.content = content;    }    public String getTime() {        return time;    }    public void setTime(String time) {        this.time = time;    }}public class ItemTag {    public TextView tv_name;    public TextView tv_content;    public TextView tv_tiem;}配置文件添加联网权限 <!-- 添加联网的权限 -->    <uses-permission android:name="android.permission.INTERNET" />